Process for making a solid golf ball

A golf ball product formed from a mixture comprising polybutadiene and a metal salt of an unsaturated carboxylic acid, said mixture having been cured with at least two free radical initiators, one said free radical initiator having a half life at 320.degree. F. which is longer than the half life at 320.degree. F. of the other said free radical initiator, the two free radical initiators being present in the ratio of about 1:9 to about 9:1, the two free radical initiators being sufficiently different in half life to yield a golf ball product having an initial velocity at least 0.5 foot per second higher than the initial velocity of the same golf ball product made with either one of said initiators alone.

In the method of making a golf ball product from an admixture of polybutadiene and a metal salt of an unsaturated carboxylic acid the improvement comprising the use of at least two free radical initiators, one said free radical initiator having a half life at 320.degree. F. which is at least three times longer than the half life at 320.degree. F. of the other said free radical initiator, the two free radical initiators being present in the ratio of about 1:9 to about 9:1 and the total amount of free radical initiator being from about 0.2 to 10 parts by weight of the polybutadiene.

A golf ball product formed from an admixture of polybutadiene and a metal salt of an unsaturated carboxylic acid the improvement comprising the use of at least two free radical initiators, one said free radical initiator having a half life at 320.degree. F. which is at least three times longer than the half life at 320.degree. F. of the other said free radical initiator, the two free radical initiators being present in the ratio of about 1:9 to about 9:1 and the total amount of free radical initiator being from about 0.2 to 10 parts by weight of the polybutadiene.

In the method of making a golf ball product from an admixture of polybutadiene and a metal salt of an unsaturated carboxylic acid the improvement comprising the use of at least two free radical initiators, the two free radical initiators being present in sufficient quantity and being sufficiently different in half life and being in a ratio which yields a golf ball product having an initial velocity at least 0.5 foot per second higher than the initial velocity of the same golf ball product made with either one of said initiators alone.

A golf ball product formed from an admixture of polybutadiene and a metal salt of an unsaturated carboxylic acid the improvement comprising the use of at least two free radical initiators, the two free radical initiators being present in sufficient quantity and being sufficiently different in half life and being in a ratio which yields a golf ball product having an initial velocity at least 0.5 foot per second higher than the initial velocity of the same golf ball product made with either one of said initiators alone.